Cover: This month’s cover highlights the Article “Metabolic oscillations on the circadian time scale in Drosophila cells lacking clock genes” by Guillaume Rey, Nikolay B Milev, Akhilesh B Reddy and colleagues. Integrative transcriptomics and proteomics analyses show that Drosophila S2 cells show daily oscillations in gene expression and metabolism, despite the fact that they do not express a functional circadian transcriptional clockwork. Cover concept by the authors. (Artistic rendition by Uta Mackensen)